Ok, Motorflote fans, you've been waiting patiently for this, so here it is....today she got her bum wet for the first time. She's been sat in the bath for over an hour, and I'm pleased to report that she hasn't taken on a drop of water. I did try a brief motive power test, but the batteries need a charge, but she is more than capable of completing a full 360 degree turn in the bath without touching the sides.
What has really surprised me is the amount of weight she's going to need to get her down to the plan water line...she floats well above the water line, so I'm thinking of swapping the battery packs for bigger capacity ones, maybe even putting in a couple of those long gel cells, one each side.
And so..when she's dried off, I'll take a look at getting some more weight into her. But I'm well happy that she floats, and floats dry.